[drivers][virtio] Depend VirtIO net on LWIP

将 VirtIO Net 的依赖从 RT_USING_ETHERNET 调整为 RT_USING_LWIP。
避免 SMART QEMU 在未启用以太网抽象时无法选择网卡。

Author: BernardXiong

components/drivers/virtio/Kconfig

@@ -21,7 +21,7 @@ config RT_VIRTIO_TRANSPORT_PCI
 config RT_VIRTIO_NET
     bool "VirtIO Net"
     depends on RT_USING_VIRTIO
-    depends on RT_USING_ETHERNET
+    depends on RT_USING_LWIP
     default y
 
 config RT_VIRTIO_BLK